2 cooking apples, cored, peeled and chopped
2 red chillies, chopped
2 black garlic bulbs, cloves separated and peeled
4 red onions, roughly chopped
2 rosemary springs
1 tbsp English mustard powder
1.5 litres/2陆 pints tomato passata
150ml/5fl oz balsamic vinegar
150g/5陆oz soft dark brown sugar
100ml/3陆fl oz olive oil
1 tsp salt
1 tbsp sweet or hot smoked paprika
100ml/3陆fl oz dark soy sauce
2 tbsp black treacle
500ml/18fl oz apple juice